Tunnel hard rock non-blasting excavation method

By drilling contour holes, enlarged holes and guide holes in the hard rock of the tunnel, and using hydraulic breaker hammers for impact crushing, the problems of low construction efficiency and high cost in the existing technology are solved, and efficient and low-cost construction is achieved. The tunnel is excavated in hard rock to avoid blasting effects and environmental pollution.

CN113586076AInactive Publication Date: 2021-11-02WUHAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
WUHAN UNIV
Filing Date
2021-08-03
Publication Date
2021-11-02
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

⚠Technical Problem

The existing technology has low construction efficiency and high cost when performing non-blasting excavation of hard rock tunnels. It also requires the use of large-scale excavation equipment and has adverse effects on the environment such as vibration and noise. It is especially difficult to meet construction requirements near residential areas. .

⚗Method used

Drill contour holes, enlarged holes and guide holes, use large-diameter drill bits to form interlocking slotted holes, and use hydraulic breaker hammers to impact and crush the slotted holes and guide holes, reducing the number of drilled holes and improving excavation efficiency. efficiency, avoid secondary crushing and directly crush the rock mass.

🎯Benefits of technology

It achieves efficient and low-cost hard rock excavation of tunnels, reduces the number of boreholes, avoids blasting effects and environmental pollution, and meets the construction needs of construction sites with strict requirements on vibration and noise.

✦ Generated by Eureka AI based on patent content.
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Abstract

The invention provides a tunnel hard rock non-blasting excavation method. The tunnel hard rock non-blasting excavation method can realize efficient excavation of complete or relatively complete hard rock without adopting large excavation equipment such as a heading machine and the like , and is characterized by comprising the following steps of 1, drilling contour holes along a tunnel face contour line so as to determine a tunnel excavation range, and determining each drilling and grooving position according to the excavation range, then, forming and drilling a plurality of cavity expanding holes in the position close to the positions; 2, drilling a plurality of rows of guide holes between the contour holes and the cavity expanding holes; 3, drilling groove forming holes which are meshed and overlapped with each other at the determined drilling and grooving positions, and finally forming a groove cavity; 4, enabling the cavity expanding holes near the groove cavity to be subjected to impact crushing, and therefore expanding excavation is conducted on the groove cavity; 5, according to a certain excavation sequence, starting from the guide holes close to the expanded and excavated groove cavity, adopting a hydraulic breaking hammer for conducting impact breaking on the guide holes, so that excavation of the rock mass of a main body part is completed; and 6, conducting impact crushing on the contour holes.
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